Fig. 1. Diagram of off-axis laser cutting process

Fig. 2. Schematic of laser cutting

Fig. 3. Nozzle structure

Fig. 4. Grid of model

Fig. 5. Equivalent graphs of velocity distribution of air flow along cutting front at different off-axis amounts. (a) Δr=0 mm; (b)Δr=0.1 mm; (c)Δr=0.3 mm; (d)Δr=0.5 mm

Fig. 6. Velocity distribution curves of air flow along cutting fronts at different off-axis amounts

Fig. 7. Pressure distribution curves of air flow along cutting fronts at different off-axis amounts

Fig. 8. Shear stress distribution curves of air flow along cutting fronts at different off-axis amounts

Fig. 9. Equivalent graphs of velocity distribution of air flow along cutting front at different H values. (a) H=0.7 mm; (b) H=1.0 mm; (c) H=1.3 mm

Fig. 10. Velocity and pressure distribution curves of air flow along cutting front at different H values. (a) Velocity distribution; (b) pressure distribution

Fig. 11. Shear stress distribution curves of air flow along cutting front at different H values

Fig. 12. Macroscopic morphology of front and back faces of cut slit at different off-axis amounts. (a)-(c) Front; (d)-(f) back

Fig. 13. Influence of off-axis amount on slag hanging quantity

Fig. 14. Influence of off-axis amount on width of cut slit. (a) Cut slit width of upper surface; (b) cut slit width of lower surface

Fig. 15. Macroscopic morphology of the front and back faces of cut slit at different H values. (a)-(c) Front; (d)-(f) back

Fig. 16. Influence of H on the width of cut slit

Fig. 17. Influence of H on slag hanging quantity